Summary

uPortal explicitly pins springVersion=4.3.30.RELEASE, but resource-server 1.5.x transitively depends on Spring 5.x. Without an exclusion, a build bumping resource-server to 1.5.x ends up with both Spring versions on the classpath; javac resolves org.springframework.web.util.UriUtils against the Spring 5 API where encodePathSegment(String, String) no longer declares throws UnsupportedEncodingException, and the catch clause in Util.encodePathSegment() becomes unreachable:

uPortal-utils-core/src/main/java/org/apereo/portal/utils/jsp/Util.java:143:
  error: exception UnsupportedEncodingException is never thrown in body
  of corresponding try statement

This is the CI failure blocking #2537 (Renovate's resource-server 1.3.1 → 1.5.2 bump).

The fix

Two <dependency>.exclude blocks on the resource-server-api and resource-server-utils declarations in uPortal-utils/uPortal-utils-core/build.gradle, cherry-picked verbatim from the equivalent hunk in @Naenyn's #2915 (where the same exclusion is part of a larger 193-file Bootstrap/jQuery PR):

api("org.jasig.resourceserver:resource-server-api:${resourceServerVersion}") {
    exclude group: 'org.springframework', module: 'spring-jcl'
    exclude group: 'org.slf4j'
}
api("org.jasig.resourceserver:resource-server-utils:${resourceServerVersion}") {
    exclude group: 'org.springframework'
    exclude group: 'org.slf4j'
}

• Narrower exclusion on resource-server-api (only spring-jcl module + all slf4j) — resource-server-api is a smaller artifact.
• Broader exclusion on resource-server-utils (all org.springframework + all slf4j) — this is the one that drags in the full Spring 5 web stack.

Landing it independently on master unblocks #2537 without coupling to the Bootstrap/jQuery work in #2915.

Test plan

Validated locally:

• master + this change @ resourceServerVersion=1.3.1 → :uPortal-utils:uPortal-utils-core:compileJava BUILD SUCCESSFUL (exclusion is benign on current master)
• master + this change @ resourceServerVersion=1.5.2 (simulated by editing gradle.properties locally) → :uPortal-utils:uPortal-utils-core:compileJava BUILD SUCCESSFUL (Util.java compile error goes away)

Related PRs — merge order to fully unblock resource-server 1.5.2

1. This PR → fixes Util.java compile error surfaced by Spring version clash.
2. Fixes for guava version bump #2943 → fixes ErrorProne CheckReturnValue on LimitingTeeWriter / LimitingTeeOutputStream that surfaces when newer Guava comes along via resource-server 1.5.x.
3. fix(deps): update resource server to v1.5.2 - autoclosed #2537 (Renovate) → the actual 1.3.1 → 1.5.2 bump; CI goes green once both fixes above have landed.
4. Bootstrap / jQuery Update & Fluid Infusion Removal #2915 (Bill's Bootstrap/jQuery PR) → rebases master and gets clean CI, leaving only content review.